Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2261:c20476d7d7b3
Enabled 3DNow! intrinsic support
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 17 Aug 2007 03:22:03 +0000 |
| parents | 202ddfd1cfb1 |
| children | bee005ace1bf |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_blit_h | |
| 25 #define _SDL_blit_h | |
| 26 | |
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27 #ifdef __MMX__ |
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28 #include <mmintrin.h> |
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29 #endif |
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30 #ifdef __3dNOW__ |
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31 #include <mm3dnow.h> |
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32 #endif |
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33 #ifdef __SSE__ |
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34 #include <xmmintrin.h> |
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35 #endif |
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36 |
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37 #include "SDL_cpuinfo.h" |
| 0 | 38 #include "SDL_endian.h" |
| 39 | |
| 40 /* The structure passed to the low level blit functions */ | |
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41 typedef struct |
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42 { |
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43 Uint8 *s_pixels; |
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44 int s_width; |
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45 int s_height; |
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46 int s_skip; |
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47 Uint8 *d_pixels; |
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48 int d_width; |
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49 int d_height; |
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50 int d_skip; |
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51 SDL_PixelFormat *src; |
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52 Uint8 *table; |
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53 SDL_PixelFormat *dst; |
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54 Uint32 ckey, cmod; |
| 0 | 55 } SDL_BlitInfo; |
| 56 | |
| 57 /* The type definition for the low level blit functions */ | |
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58 typedef void (*SDL_loblit) (SDL_BlitInfo * info); |
| 0 | 59 |
| 60 /* Blit mapping definition */ | |
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61 typedef struct SDL_BlitMap |
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62 { |
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63 SDL_Surface *dst; |
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64 int identity; |
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65 Uint8 *table; |
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66 SDL_blit blit; |
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67 void *data; |
| 2260 | 68 Uint32 ckey; /* colorkey */ |
| 69 Uint32 cmod; /* ARGB modulation */ | |
| 0 | 70 |
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71 /* the version count matches the destination; mismatch indicates |
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72 an invalid mapping */ |
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73 unsigned int format_version; |
| 0 | 74 } SDL_BlitMap; |
| 75 | |
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76 #define SDL_BLIT_ANY 0x00000000 |
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77 #define SDL_BLIT_MMX 0x00000001 |
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78 #define SDL_BLIT_SSE 0x00000002 |
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79 #define SDL_BLIT_ALTIVEC_PREFETCH 0x00000004 |
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80 #define SDL_BLIT_ALTIVEC_NOPREFETCH 0x00000008 |
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81 |
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82 typedef struct SDL_BlitEntry |
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83 { |
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84 Uint32 features; |
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85 SDL_loblit blit; |
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86 } SDL_BlitEntry; |
| 0 | 87 |
| 88 /* Functions found in SDL_blit.c */ | |
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89 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 90 |
| 91 /* Functions found in SDL_blit_{0,1,N,A}.c */ | |
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92 extern SDL_loblit SDL_CalculateBlit0(SDL_Surface * surface, int complex); |
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93 extern SDL_loblit SDL_CalculateBlit1(SDL_Surface * surface, int complex); |
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94 extern SDL_loblit SDL_CalculateBlitN(SDL_Surface * surface, int complex); |
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95 extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface * surface, int complex); |
| 0 | 96 |
| 97 /* | |
| 98 * Useful macros for blitting routines | |
| 99 */ | |
| 100 | |
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101 #if defined(__GNUC__) |
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102 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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103 #elif defined(_MSC_VER) |
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104 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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105 #else |
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106 #define DECLARE_ALIGNED(t,v,a) t v |
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107 #endif |
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108 |
| 0 | 109 #define FORMAT_EQUAL(A, B) \ |
| 110 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 111 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 112 | |
| 113 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 114 /* FIXME: rescale values to 0..255 here? */ | |
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115 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 116 { \ |
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117 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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118 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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119 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 120 } |
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121 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 122 { \ |
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123 r = (((Pixel&0xF800)>>11)<<3); \ |
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124 g = (((Pixel&0x07E0)>>5)<<2); \ |
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125 b = ((Pixel&0x001F)<<3); \ |
| 0 | 126 } |
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127 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 128 { \ |
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129 r = (((Pixel&0x7C00)>>10)<<3); \ |
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130 g = (((Pixel&0x03E0)>>5)<<3); \ |
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131 b = ((Pixel&0x001F)<<3); \ |
| 0 | 132 } |
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133 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 134 { \ |
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135 r = ((Pixel&0xFF0000)>>16); \ |
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136 g = ((Pixel&0xFF00)>>8); \ |
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137 b = (Pixel&0xFF); \ |
| 0 | 138 } |
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139 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 140 do { \ |
| 141 switch (bpp) { \ | |
| 142 case 2: \ | |
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143 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 144 break; \ |
| 145 \ | |
| 146 case 3: { \ | |
| 147 Uint8 *B = (Uint8 *)(buf); \ | |
| 148 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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149 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 150 } else { \ |
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151 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 152 } \ |
| 153 } \ | |
| 154 break; \ | |
| 155 \ | |
| 156 case 4: \ | |
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157 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 158 break; \ |
| 159 \ | |
| 160 default: \ | |
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161 Pixel = 0; /* appease gcc */ \ |
| 0 | 162 break; \ |
| 163 } \ | |
| 164 } while(0) | |
| 165 | |
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166 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 167 do { \ |
| 168 switch (bpp) { \ | |
| 169 case 2: \ | |
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170 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 171 break; \ |
| 172 \ | |
| 173 case 3: { \ | |
| 174 Uint8 *B = (Uint8 *)buf; \ | |
| 175 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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176 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 177 } else { \ |
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178 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 179 } \ |
| 180 } \ | |
| 181 break; \ | |
| 182 \ | |
| 183 case 4: \ | |
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184 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 185 break; \ |
| 186 \ | |
| 187 default: \ | |
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188 Pixel = 0; /* prevent gcc from complaining */ \ |
| 0 | 189 break; \ |
| 190 } \ | |
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191 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 192 } while(0) |
| 193 | |
| 194 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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195 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 196 { \ |
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197 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 198 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 199 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 200 } | |
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201 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 202 { \ |
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203 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 204 } |
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205 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 206 { \ |
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207 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 208 } |
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209 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 210 { \ |
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211 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 212 } |
| 213 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 214 { \ | |
| 215 switch (bpp) { \ | |
| 216 case 2: { \ | |
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217 Uint16 Pixel; \ |
| 0 | 218 \ |
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219 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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220 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 221 } \ |
| 222 break; \ | |
| 223 \ | |
| 224 case 3: { \ | |
| 225 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 226 *((buf)+fmt->Rshift/8) = r; \ | |
| 227 *((buf)+fmt->Gshift/8) = g; \ | |
| 228 *((buf)+fmt->Bshift/8) = b; \ | |
| 229 } else { \ | |
| 230 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 231 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 232 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 233 } \ | |
| 234 } \ | |
| 235 break; \ | |
| 236 \ | |
| 237 case 4: { \ | |
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238 Uint32 Pixel; \ |
| 0 | 239 \ |
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240 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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241 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 242 } \ |
| 243 break; \ | |
| 244 } \ | |
| 245 } | |
| 246 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 247 { \ | |
| 248 switch (bpp) { \ | |
| 249 case 2: { \ | |
| 250 Uint16 *bufp; \ | |
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251 Uint16 Pixel; \ |
| 0 | 252 \ |
| 253 bufp = (Uint16 *)buf; \ | |
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254 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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255 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 256 } \ |
| 257 break; \ | |
| 258 \ | |
| 259 case 3: { \ | |
| 260 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 261 *((buf)+fmt->Rshift/8) = r; \ | |
| 262 *((buf)+fmt->Gshift/8) = g; \ | |
| 263 *((buf)+fmt->Bshift/8) = b; \ | |
| 264 } else { \ | |
| 265 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 266 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 267 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 268 } \ | |
| 269 } \ | |
| 270 break; \ | |
| 271 \ | |
| 272 case 4: { \ | |
| 273 Uint32 *bufp; \ | |
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274 Uint32 Pixel; \ |
| 0 | 275 \ |
| 276 bufp = (Uint32 *)buf; \ | |
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277 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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278 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 279 } \ |
| 280 break; \ | |
| 281 } \ | |
| 282 } | |
| 283 | |
| 284 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
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285 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 286 { \ |
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287 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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288 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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289 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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290 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 291 } |
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292 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 293 { \ |
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294 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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295 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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296 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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297 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 298 } |
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299 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 300 { \ |
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301 r = (Pixel>>24); \ |
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302 g = ((Pixel>>16)&0xFF); \ |
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303 b = ((Pixel>>8)&0xFF); \ |
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304 a = (Pixel&0xFF); \ |
| 0 | 305 } |
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306 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 307 { \ |
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308 r = ((Pixel>>16)&0xFF); \ |
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309 g = ((Pixel>>8)&0xFF); \ |
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310 b = (Pixel&0xFF); \ |
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311 a = (Pixel>>24); \ |
| 0 | 312 } |
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313 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 314 { \ |
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315 r = (Pixel&0xFF); \ |
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316 g = ((Pixel>>8)&0xFF); \ |
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317 b = ((Pixel>>16)&0xFF); \ |
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318 a = (Pixel>>24); \ |
| 0 | 319 } |
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320 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 321 do { \ |
| 322 switch (bpp) { \ | |
| 323 case 2: \ | |
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324 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 325 break; \ |
| 326 \ | |
| 327 case 3: {/* FIXME: broken code (no alpha) */ \ | |
| 328 Uint8 *b = (Uint8 *)buf; \ | |
| 329 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
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330 Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \ |
| 0 | 331 } else { \ |
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332 Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \ |
| 0 | 333 } \ |
| 334 } \ | |
| 335 break; \ | |
| 336 \ | |
| 337 case 4: \ | |
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338 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 339 break; \ |
| 340 \ | |
| 341 default: \ | |
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342 Pixel = 0; /* stop gcc complaints */ \ |
| 0 | 343 break; \ |
| 344 } \ | |
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345 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
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346 Pixel &= ~fmt->Amask; \ |
| 0 | 347 } while(0) |
| 348 | |
| 349 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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350 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 351 { \ |
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352 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 353 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 354 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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355 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 356 } |
| 357 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 358 { \ | |
| 359 switch (bpp) { \ | |
| 360 case 2: { \ | |
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361 Uint16 Pixel; \ |
| 0 | 362 \ |
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363 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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364 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 365 } \ |
| 366 break; \ | |
| 367 \ | |
| 368 case 3: { /* FIXME: broken code (no alpha) */ \ | |
| 369 if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ | |
| 370 *((buf)+fmt->Rshift/8) = r; \ | |
| 371 *((buf)+fmt->Gshift/8) = g; \ | |
| 372 *((buf)+fmt->Bshift/8) = b; \ | |
| 373 } else { \ | |
| 374 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 375 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 376 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 377 } \ | |
| 378 } \ | |
| 379 break; \ | |
| 380 \ | |
| 381 case 4: { \ | |
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382 Uint32 Pixel; \ |
| 0 | 383 \ |
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384 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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385 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 386 } \ |
| 387 break; \ | |
| 388 } \ | |
| 389 } | |
| 390 | |
|
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391 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 392 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 393 do { \ | |
| 394 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 395 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 396 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 397 } while(0) | |
| 398 | |
|
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399 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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400 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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401 do { \ |
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402 unsigned tR, tG, tB, tA; \ |
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403 tA = 255 - sA; \ |
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404 tR = 1 + (sR * sA) + (dR * tA); \ |
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405 dR = (tR + (tR >> 8)) >> 8; \ |
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406 tG = 1 + (sG * sA) + (dG * tA); \ |
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407 dG = (tG + (tG >> 8)) >> 8; \ |
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408 tB = 1 + (sB * sA) + (dB * tA); \ |
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409 dB = (tB + (tB >> 8)) >> 8; \ |
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410 } while(0) |
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411 |
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412 |
| 0 | 413 /* This is a very useful loop for optimizing blitters */ |
|
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414 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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415 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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416 #else |
| 0 | 417 #define USE_DUFFS_LOOP |
|
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418 #endif |
| 0 | 419 #ifdef USE_DUFFS_LOOP |
| 420 | |
| 421 /* 8-times unrolled loop */ | |
| 422 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 423 { int n = (width+7)/8; \ | |
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424 switch (width & 7) { \ |
| 0 | 425 case 0: do { pixel_copy_increment; \ |
| 426 case 7: pixel_copy_increment; \ | |
| 427 case 6: pixel_copy_increment; \ | |
| 428 case 5: pixel_copy_increment; \ | |
| 429 case 4: pixel_copy_increment; \ | |
| 430 case 3: pixel_copy_increment; \ | |
| 431 case 2: pixel_copy_increment; \ | |
| 432 case 1: pixel_copy_increment; \ | |
| 433 } while ( --n > 0 ); \ | |
| 434 } \ | |
| 435 } | |
| 436 | |
| 437 /* 4-times unrolled loop */ | |
| 438 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 439 { int n = (width+3)/4; \ | |
|
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440 switch (width & 3) { \ |
| 0 | 441 case 0: do { pixel_copy_increment; \ |
| 442 case 3: pixel_copy_increment; \ | |
| 443 case 2: pixel_copy_increment; \ | |
| 444 case 1: pixel_copy_increment; \ | |
| 445 } while ( --n > 0 ); \ | |
| 446 } \ | |
| 447 } | |
| 448 | |
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449 /* 2 - times unrolled loop */ |
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450 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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451 double_pixel_copy_increment, width) \ |
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452 { int n, w = width; \ |
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453 if( w & 1 ) { \ |
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454 pixel_copy_increment; \ |
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455 w--; \ |
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456 } \ |
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457 if ( w > 0 ) { \ |
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458 n = ( w + 2) / 4; \ |
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459 switch( w & 2 ) { \ |
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460 case 0: do { double_pixel_copy_increment; \ |
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461 case 2: double_pixel_copy_increment; \ |
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462 } while ( --n > 0 ); \ |
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463 } \ |
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464 } \ |
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465 } |
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466 |
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467 /* 2 - times unrolled loop 4 pixels */ |
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468 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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469 double_pixel_copy_increment, \ |
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470 quatro_pixel_copy_increment, width) \ |
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471 { int n, w = width; \ |
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472 if(w & 1) { \ |
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473 pixel_copy_increment; \ |
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474 w--; \ |
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475 } \ |
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476 if(w & 2) { \ |
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477 double_pixel_copy_increment; \ |
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478 w -= 2; \ |
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479 } \ |
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480 if ( w > 0 ) { \ |
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481 n = ( w + 7 ) / 8; \ |
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482 switch( w & 4 ) { \ |
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483 case 0: do { quatro_pixel_copy_increment; \ |
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484 case 4: quatro_pixel_copy_increment; \ |
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485 } while ( --n > 0 ); \ |
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486 } \ |
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487 } \ |
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488 } |
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489 |
| 0 | 490 /* Use the 8-times version of the loop by default */ |
| 491 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 492 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 493 | |
| 494 #else | |
| 495 | |
| 496 /* Don't use Duff's device to unroll loops */ | |
|
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497 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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498 double_pixel_copy_increment, width) \ |
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499 { int n = width; \ |
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500 if( n & 1 ) { \ |
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501 pixel_copy_increment; \ |
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502 n--; \ |
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503 } \ |
|
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504 n=n>>1; \ |
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505 for(; n > 0; --n) { \ |
|
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506 double_pixel_copy_increment; \ |
|
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507 } \ |
|
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508 } |
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509 |
|
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510 /* Don't use Duff's device to unroll loops */ |
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511 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
|
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512 double_pixel_copy_increment, \ |
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513 quatro_pixel_copy_increment, width) \ |
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514 { int n = width; \ |
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515 if(n & 1) { \ |
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516 pixel_copy_increment; \ |
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517 n--; \ |
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518 } \ |
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519 if(n & 2) { \ |
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520 double_pixel_copy_increment; \ |
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521 n -= 2; \ |
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522 } \ |
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523 n=n>>2; \ |
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524 for(; n > 0; --n) { \ |
|
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525 quatro_pixel_copy_increment; \ |
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526 } \ |
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527 } |
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528 |
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529 /* Don't use Duff's device to unroll loops */ |
| 0 | 530 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 531 { int n; \ | |
| 532 for ( n=width; n > 0; --n ) { \ | |
| 533 pixel_copy_increment; \ | |
| 534 } \ | |
| 535 } | |
| 536 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 537 DUFFS_LOOP(pixel_copy_increment, width) | |
| 538 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 539 DUFFS_LOOP(pixel_copy_increment, width) | |
| 540 | |
| 541 #endif /* USE_DUFFS_LOOP */ | |
| 542 | |
| 543 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 544 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 545 #pragma warning(disable: 4550) | |
| 546 #endif | |
| 547 | |
| 548 #endif /* _SDL_blit_h */ | |
|
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549 /* vi: set ts=4 sw=4 expandtab: */ |